KR101497340B1 - Uninterruptible connecting panel of transformer for underground power distribution line - Google Patents

Abstract

The present invention relates to an uninterruptible connection panel structure of a transformer for an underground power distribution line. The present invention provides the uninterruptible connection panel structure of the transformer for the underground power distribution line capable of safely operating the transformer of the underground power distribution line with an uninterruptible state without the risk of an electric shock accident by connecting or detaching a bypass cable to or from a primary terminal and a secondary terminal of the transformer by enabling a worker to operate only the conversion switch. The present invention includes the transformer, a primary side complex connector, a secondary side complex connector, a primary side switch, a secondary side switch, a primary side bypass input cable, a primary side bypass output cable, a secondary side bypass input cable, a secondary side bypass output cable, a movable transformer, a primary side junction cable, a secondary side junction cable, and a detaching unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a transformer for an underground power distribution line,

[0001] The present invention relates to an uninterruptible connection panel structure of a transformer with an underground distribution line, and more particularly, to a connection and detachment of a bypass cable to a primary terminal and a secondary terminal of a transformer, It is possible to connect and disconnect the bypass cable to the primary terminal and the secondary terminal of the transformer only by the operator operating the changeover switch without manually performing the connection and disconnection of the transformer to the underground distribution line, The present invention relates to an uninterruptible connection panel structure of a transformer with an underground distribution line that can be safely performed without risk of an electric shock accident.

Generally, high-voltage electric power which is generated in a power plant and stepped up or down in a substation is transmitted through a transmission line, and a special high-voltage current is transformed into electricity for household electricity and industrial facilities by a transformer, Of the population.

(22.9kV), which is transmitted through a processing power transmission line, is connected to a general household electricity (220V) by the transformer installed in the pole. (380V) for industrial facilities, processing and distribution system for distributing electricity to customers such as homes and industrial facilities through processing distribution lines, and a 22.9 kV special supply system that is installed in the ground through underground transmission lines and underground distribution lines. Underground distribution system in which high-voltage current is transformed to 220V for general household and 380V for industrial facility by ground transformer installed on the ground and distributed to customers such as homes and industrial facilities through underground distribution lines.

Conventionally, transmission lines and distribution lines have been used for supporting transmission lines and distribution lines at a certain interval on the ground. However, in urban areas that are expanding and complicated day by day, have.

As shown in FIG. 14, the underground transmission and distribution system includes an underground transmission line L1 for transmitting an extra high voltage current and a ground distribution line L2 for distributing electric power for domestic and industrial facilities to a customer 5 A ground transformer (2) installed in a transformer cabinet (1) installed on the ground and for transforming a high voltage electric power transmitted through an underground transmission line (L1) into electricity for household electricity and industrial facilities, and a ground transformer And a switchgear (4) installed in the main body (3) for opening and closing the underground distribution line (L2).

These wires and transformers used in the transmission and distribution lines may become obsolete or fail due to the passage of time. If there is a risk that the transmission and distribution will not be performed smoothly or fire may occur due to the arc, Maintenance and repair work will be done from time to time for distribution and safety.

In the maintenance and repair work, an uninterruptible power supply system is used in which an operation is performed in a power interruption (inactive wire) state in which electricity is cut off and an uninterruptible operation system in which an operation is performed in an uninterrupted (live) state in which electricity is not cut off.

In consideration of safety, it is preferable to use the electrostatic method that performs the work in the power failure state in which the electricity is completely shut off. However, when the power failure state is maintained for the maintenance and maintenance, all the electric devices on the customer side are shut down, It is desirable to use an uninterruptible power supply system that performs maintenance and maintenance work while maintaining the transmission line and the distribution line in an uninterruptible state.

As a prior art related to the above-described uninterruptible power supply system, there is a "primary side connecting apparatus for replacing a transformer by the uninterruptible power supply method" (prior art 1 ') of Korean Patent Registration No. 10-0769335 (registered October 16, 2007).

In the prior art 1, the left and right connecting members connected to the conductive connecting bar are molded into an insulating layer and a shield layer so as to connect the elbow connecting members. In the connecting member, a socket portion is formed, A cable junction having a built-in inner frame continuously connected with a soho tube for blocking an arc to be generated; A plurality of support pieces protruding from the front surface of the base so as to support the cable junction in the horizontal and vertical oblique directions; And a toggle clamp that is rotatably mounted on the bottom surface and is removable and removable from the base, so that the elbow joint member can be quickly and effectively separated and connected. Therefore, workability and efficiency To maximize the performance of the system.

However, the prior art 1 includes a cable junction for connecting the mobile transformer to the primary elbow joint of the transformer in a live state, and the work of connecting or disconnecting the cable junction to the primary elbow joint is manually operated So that there is a problem that an electric shock occurs.

As a prior art related to the uninterruptible power system, Korean Unexamined Patent Publication No. 10-0926445 (Registered on Nov. 5, 2009) entitled "Uninterruptible bypass construction method of underground distribution line using an extension elbow having branch connection function" .

The prior art 2 relates to an uninterruptible bypass installation method of an underground distribution line for uninterrupted maintenance including maintenance of a device such as a transformer and a switch of an underground distribution line, and cable replacement, and more particularly, An extension elbow with a separate branch connection function that enables the uninterruptible bypass installation to the underground distribution line instead of the existing elbow connection which can only be connected to the end of the underground cable to connect the transformer. Or in case of existing underground lines, the existing elbow connection port is replaced with the extension elbow by uninterrupted connection method by the sequential disconnecting connection method. In case of uninterrupted construction such as installation of transformer, switch and cable for underground distribution line, To the temporary trans- In addition to providing a safe and quick uninterrupted installation by installing unscrambled cables, most of the work on underground distribution lines has been done in the night by electrostatic operation, which is dangerous and inefficient. In the uninterrupted state, all the work for the construction is performed in the daytime, so that it is very safe and economical.

However, the prior art 2 has an extension elbow and a bypass cable to manually connect or disconnect the bypass cable to / from the extension elbow in the live state, which causes an electric shock accident.

Therefore, when the operator operates the changeover switch without manually connecting or disconnecting the bypass cable, the bypass cable is connected or disconnected so that the transformer of the underground distribution line can be replaced with an uninterrupted state without causing an electric shock accident. It is necessary to develop the uninterruptible connection panel structure of transformer with distribution line.

Korean Registered Patent No. 10-0769335 (Registered October 16, 2007) "Primary Side Connection Device for Replacement of Transformer by Uninterrupted Method" Korea Patent Registration No. 10-0926445 (Registered on November 5, 2009.) "Uninterruptible bypass installation method of underground distribution line using extension elbow with branch connection function"

Therefore, the bypass cable connection and disconnection to the primary and secondary terminals of the transformer, and the connection and disconnection of the junction cable to the mobile transformer are not manually performed by the operator, By connecting and disconnecting the bypass cable to the primary and secondary terminals, an uninterruptible connection panel structure of the underground distribution line transformer enables the transformer of the underground distribution line to be safely performed in the uninterrupted state without the risk of electric shock accident .

According to an aspect of the present invention, there is provided a transformer cabinet comprising: a ground-mounted transformer cabinet; A transformer installed in the transformer cabinet, the transformer having a primary terminal of a transformer connected to an underground transmission line and a secondary terminal of a transformer connected to an underground distribution line; A primary side multiple connection port having a transformer primary terminal connection portion detachably connected to the primary terminal of the transformer, a ground transmission line connection portion, and a primary side bypass input cable connection portion; A secondary side multiple connection port having a transformer secondary terminal connection portion detachably connected to the secondary terminal of the transformer, a ground distribution line connection portion, and a secondary bypass connection portion; A primary side switch and a secondary side switch provided on both sides of the transformer and equipped with a primary side switch input terminal, a primary side switch output terminal, a secondary side switch input terminal and a secondary side switch output terminal; A primary side bypass input cable for connecting a primary side bypass connection portion of the primary side multiple access port and a primary side switch input terminal of the primary side switch to a primary bypass switch connected to the primary side switch output terminal of the primary side switch, Output cable; A secondary side bypass input cable connected to a secondary side switch input terminal of the secondary side switch; A secondary side bypass output cable connecting the secondary side bypass connection portion of the secondary side composite connection port and the secondary side switch output terminal of the secondary side switch; A movable transformer having a movable transformer primary terminal and a movable transformer secondary terminal; A primary side junction cable connecting the primary bypass output cable and the primary transformer primary terminal; A secondary side junction cable connecting the secondary side bypass input cable and the secondary side terminal of the mobile transformer; And a detachment means for detachably attaching the primary side compounded connection port and the secondary side compounded connection port to the primary side terminal of the transformer and the secondary side terminal of the transformer,

The cabinet includes a cabinet main body having a front plate and a mounting plate and a ceiling plate on which the transformer, the primary switch, and the secondary switch are mounted, And a door for opening and closing the front surface of the door,

The primary terminal of the transformer and the secondary terminal of the transformer of the transformer are configured in the form of a conventional bushing,

The ground transmission line is provided with a ground transmission line connection port connected to a ground transmission line connection portion of the primary side compound connection port,

The ground distribution line is provided with a ground distribution line connection port connected to a ground distribution line connection portion of the secondary composite connection port,

Side bypass input cable, a primary side bypass input cable transformer connection port connected to the primary side bypass input cable connection portion of the primary side composite connection port, and a primary side bypass input cable connection port connected to the primary side switch input terminal of the primary side switch By-pass input cable There is a switch connection port,

Side bypass output cable, a primary side bypass output cable connection port connected to the primary side switch output terminal of the primary side switch, a primary side bypass output cable connection port for connecting to the primary side junction cable, Respectively,

Side bypass input cable and a secondary side bypass input cable switch for connecting to a secondary side switch input terminal of the secondary side switch, A connection port is provided,

Side bypass output cable for connecting to the output terminal of the secondary side switch of the secondary side switch and a secondary side bypass output cable connection port for connecting to the secondary side bypass output cable connection of the secondary side composite output terminal A secondary side bypass output cable for transformer connection is provided,

A primary side junction cable bypass connection port for connecting to the primary side bypass output cable junction connection port and a primary side junction cable type transformer connection port connected to the primary side terminal of the movable transformer of the movable type transformer are provided at both ends of the primary side junction cable Respectively,

A secondary side junction cable for connecting to the secondary side bypass input cable junction connection port, and a secondary side junction cable type transformer connection port for connecting to the secondary side terminal of the movable transformer of the mobile type transformer, Respectively,

A driving motor having a hollow motor shaft mounted on a bottom surface of a ceiling plate of the cabinet and having a female screw portion having opposite helical directions on opposite sides of an inner circumferential surface thereof; A pair of drive screws having a male screw portion engaged with the female screw portion; And a connecting rod fixed to the upper end of the driving screw and coupled to the primary side multiple connection port and the secondary side multiple connection port, respectively, to provide an uninterruptible connection panel structure of the underground distribution line transformer.

According to the uninterruptible connection panel structure of the underground distribution line transformer of the present invention, a transformer cabinet installed on the ground; A transformer installed in the transformer cabinet, the transformer having a primary terminal of a transformer connected to an underground transmission line and a secondary terminal of a transformer connected to an underground distribution line; A primary side multiple connection port having a transformer primary terminal connection portion detachably connected to the primary terminal of the transformer, a ground transmission line connection portion, and a primary side bypass input cable connection portion; A secondary side multiple connection port having a transformer secondary terminal connection portion detachably connected to the secondary terminal of the transformer, a ground distribution line connection portion, and a secondary bypass connection portion; A primary side switch and a secondary side switch provided on both sides of the transformer and equipped with a primary side switch input terminal, a primary side switch output terminal, a secondary side switch input terminal and a secondary side switch output terminal; A primary side bypass input cable for connecting a primary side bypass connection portion of the primary side multiple access port and a primary side switch input terminal of the primary side switch to a primary bypass switch connected to the primary side switch output terminal of the primary side switch, Output cable; A secondary side bypass input cable connected to a secondary side switch input terminal of the secondary side switch; A secondary bypass output cable connecting a secondary bypass connection of the secondary side multiple connection port to a secondary side switch input terminal of the secondary side switch; A movable transformer having a movable transformer primary terminal and a movable transformer secondary terminal; A primary side junction cable connecting the primary bypass output cable and the primary transformer primary terminal; A secondary side junction cable connecting the secondary side bypass input cable and the secondary side terminal of the mobile transformer; And a detachment means for detachably attaching the primary side compounded connection port and the secondary side compounded connection port to the primary side terminal of the transformer and the secondary side terminal of the transformer, respectively. The bypass cable for the primary side terminal and the secondary side terminal of the transformer Connection and removal of the bypass cable to and from the primary and secondary terminals of the transformer only by the operator operating the changeover switch without manually performing connection and removal of the junction cable to and from the mobile transformer The transformer of the underground distribution line can be safely performed in the uninterrupted state without any risk of electric shock accident.

1 to 13 show a preferred embodiment of the uninterruptible connection panel structure of the underground distribution line transformer according to the present invention,
FIG. 1 is an overall perspective view,
2 is a perspective view showing a state in which a top plate and a door of a cabinet are removed,
3 is an exploded perspective view except for the cabinet,
Fig. 4 is an exploded perspective view of a transformer, a transmission line, a distribution line, a bypass input cable, a bypass output cable,
5 is a cross-sectional view showing a connection structure of a transformer primary terminal, an underground transmission line and a primary bypass input cable,
6 is a cross-sectional view showing a connection structure of a transformer secondary terminal, an underground distribution line and a secondary bypass output cable,
7 is a transverse plan view showing a connection structure of a primary side bypass input cable, a primary bypass output cable, and a primary side breaker,
8 is a transverse plan view showing the connection structure of the secondary bypass input cable, the secondary bypass output cable, and the secondary switch,
9 is a left side view of the terminal showing the connection structure between the primary side bypass output cable, the primary junction cable, and the mobile transformer,
10 is a left side view of the terminal showing the connection structure of the secondary bypass input cable, the secondary junction cable, and the mobile transformer,
11 is a perspective view showing a normal transmission and distribution state,
12 is a perspective view showing a state where a bypass cable and a mobile transformer are connected by a junction cable,
13 is a perspective view showing a state in which the primary side multiple connection port and the secondary side multiple connection port are separated from the primary side terminal of the transformer and the secondary side terminal of the transformer,
And,
14 is a schematic view showing a conventional underground transmission and distribution line.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0027] Hereinafter, an uninterruptible connection panel structure of a transformer according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the uninterruptible connection panel structure of the underground distribution line transformer according to the present embodiment includes a ground-mounted transformer cabinet 10; A transformer 300 installed in the transformer cabinet 10 and provided with a transformer primary terminal 310 to which the underground transmission line 100 is connected and a transformer secondary terminal 320 to which the underground distribution line 200 is connected, ; A primary side multiple connection port 400 provided with a transformer primary terminal connection portion 410 detachably connected to the transformer primary terminal 310, an underground transmission line connection portion 420 and a primary bypass input cable connection portion 430, Wow; A secondary side composite connection port 500 having a transformer secondary terminal connection part 510 detachably connected to the transformer secondary side terminal 320 and an underground distribution line connection part 520 and a secondary side bypass output cable connection part 530, Wow; A transformer 300 having a primary side switch input terminal 610 and a primary side switch output terminal 620, a secondary side switch input terminal 710 and a secondary side switch output terminal 720 provided on both sides of the transformer 300, Side switch 600 and a secondary-side switch 700; A primary side bypass input cable 800 for connecting the primary side bypass connection part 430 of the primary side multiple access port 400 and the primary side switch input terminal 610 of the primary side switch 600, A primary side bypass output cable 900 connected to the primary side switch output terminal 620 of the secondary side switch 600; A secondary side bypass input cable 1000 connected to the secondary side switch input terminal 710 of the secondary side switch 700; A secondary side bypass output cable 1100 connecting the secondary side bypass output cable connecting portion 530 of the secondary side multiple access port 500 and the secondary side switch output terminal 720 of the secondary side switch 700; A movable transformer 1200 having a movable transformer primary terminal 1210 and a movable transformer secondary terminal 1220; A primary junction cable 1300 connecting the primary bypass output cable 900 and the primary transformer primary terminal 1210; A secondary junction cable 1400 connecting the secondary bypass input cable 1000 and the movable transformer secondary terminal 1220; And a detachment means 1500 for detachably attaching the primary side multiple connection port 400 and the secondary side compound connection port 500 to the transformer primary terminal 310 and the transformer secondary terminal 320 respectively.

The cabinet 10 includes a bottom plate 12 seated on the ground and an upper portion spaced upwardly from the bottom plate 12 so that the transformer 300 and the primary side switch 500 and the secondary side switch 600 And a door 15 for opening and closing the front surface of the main body 11. The cabinet body 11 has a mounting plate 13 and a ceiling plate 14 mounted thereon,

A space 15 is formed between the bottom plate 12 and the mounting plate 13 so that the primary bypass cable 800 and the secondary bypass cable 900 can pass through.

The underground transmission line 100 is connected to the underground distribution line 200, the primary bypass input cable 800, the primary bypass output cable 900, the secondary bypass input cable 1000, the secondary bypass output cable 1100), the primary side junction cable 1300 and the secondary side junction cable 1400 are each made of a three-phase cable.

The transformer primary terminal 310 and the transformer secondary terminal 320 of the transformer 300 are formed in a conventional bushing shape and include conductor portions 311 and 321 formed with connection grooves 312 and 322, And insulator portions 313 and 323 surrounding the conductor portions 311 and 321 and having conical outer peripheral surfaces 314 and 324.

The transformer primary terminal 310 and the conductor portions 311 and 321 of the transformer secondary terminal 320 are electrically connected to the input side and the output side of a transformer (not shown) of the transformer 300, The internal structure of the transformer 300 and the connection structure between the transformer primary terminal 310 and the transformer secondary terminal 320 are not shown and described.

The primary side multiple connection port 400 includes a connection protrusion 412 corresponding to the connection groove 312 of the primary terminal 310 of the transformer and a conductive portion 413 having a conical inner peripheral surface 413 corresponding to the conical outer peripheral surface 314. [ A transformer primary terminal connection part 410 having an insulator part 411 surrounding the conductor part 411 and an insulator part 414 surrounding the conductor part 411; And an insulator section 424 integrally formed with the conductor section 411 and surrounding the conductor section 421. The conductor section 421 has a connection protrusion 422 and a conical inner circumferential surface 423, (420); And a conductor portion 431 formed integrally with the conductor portion 411 and having a connection protrusion 432 and a conical inner circumferential surface 433 and an insulator portion 434 surrounding the conductor portion 431, And a bypass input cable connection unit 430.

The secondary side composite connection port 500 includes a connection protrusion 512 corresponding to the connection groove 322 of the secondary terminal 320 of the transformer and a conductive portion 512 having a conical inner peripheral surface 513 corresponding to the conical outer peripheral surface 324. [ A transformer primary terminal connection portion 510 having an insulator portion 511 surrounding the conductor portion 511 and an insulator portion 514 surrounding the conductor portion 511; And a conductor portion 521 integrally formed on the conductor portion 511 and having a connection protrusion 522 and a conical inner circumferential surface 523 and an insulator portion 524 surrounding the conductor portion 521, (520); And an insulator portion 524 which is integrally formed on the conductor portion 511 and surrounds the conductor portion 531 and has a connecting protrusion 532 and a conical inner circumferential surface 533, And a bypass output cable connection unit 530 (see FIG. 6).

When connecting the underground transmission line 100 to the underground transmission line connection part 420 of the primary side composite connection port 400, the insulation cover 102 at the front end of the underground transmission line 100 is peeled off so that the conductor part 101 is exposed The conductor portion 101 may be directly connected to the conductor portion 421 of the underground power transmission line connection portion 420 of the primary side multiple access port 400. However, It is preferable to connect them by the transmission line connection port 110.

The underground power transmission line connection port 110 is connected to the connection groove 112 corresponding to the connection protrusion 422 of the underground power transmission line connection part 420 of the primary side multiple access port 400 and the conductor part 101 of the underground power transmission line 100, Which has a conical outer circumferential surface 115 corresponding to the conical inner circumferential surface 423 of the underground power transmission line connecting portion 420 and surrounding the conductor portion 111, (See FIG. 5).

When the underground distribution line 200 is connected to the underground distribution line connection unit 520 of the secondary side composite connection port 500, the insulation cover 201 at the front end of the underground distribution line 200 is peeled off to expose the conductor unit 201 The conductor portion 201 may be directly connected to the conductor portion 521 of the underground distribution line connection portion 520 of the secondary side composite connection port 500. However, as shown in the figure, the conductor portion 201 may be directly connected to the underground distribution line 200 It is preferable to connect them by the power distribution line connection port 210.

The ground distribution line connection port 210 is formed with a connection groove 212 corresponding to the connection protrusion 522 of the ground distribution line connection part 520 and a connection groove 213 corresponding to the conductor part 201 of the ground distribution line 200, And an insulator section 214 surrounding the conductor section 211 and having a conical outer circumferential surface 215 corresponding to the conical inner circumferential surface 523 of the underground distribution line connection section 520 (See FIG. 6).

The primary side switch input terminal 610 and the primary side switch output terminal 620 of the primary side switch 600 are formed in a conventional bushing shape and are provided with conductor portions 611 and 621 formed with connection grooves 612 and 622 And insulator portions 613 and 623 surrounding the conductor portions 611 and 621 and having conical outer peripheral surfaces 614 and 624.

The secondary side switch input terminal 710 and the secondary side switch output terminal 720 of the secondary side switch 700 are formed in the conventional bushing type and are provided with the conductor portions 711 and 721 formed with the connection grooves 712 and 722 And insulator portions 713 and 723 surrounding the conductor portions 711 and 721 and having conical outer peripheral surfaces 714 and 724.

When the primary side bypass input cable 800 is connected to the primary side bypass input cable connection portion 430 of the primary side multiple access port 400 and the primary side switch input terminal 610 of the primary side switch 600, The insulation coatings 802 and 804 at both ends of the primary bypass input cable 800 are peeled off so that the conductor portions 801 and 803 are exposed so that the conductor portions 801 and 803 are connected to the primary side multi- May be directly connected to the conductor portion 431 of the primary side bypass input cable connection portion 430 of the primary side switch 600 and the conductor portion 611 of the primary side switch input terminal 610 of the primary side switch 600, It is preferable to connect the primary side bypass input cable transformer connection port 810 and the primary side bypass input cable switch connection port 820. [

The primary side bypass input cable transformer connection port 810 has a connection groove 812 corresponding to the connection protrusion 432 of the primary side bypass input cable connection portion 430 of the primary side multiple access port 400, A conductor portion 811 having a connection groove 813 corresponding to the conductor portion 801 of the bypass input cable 800 and a conductor portion 811 surrounding the conductor portion 811 and connected to the primary side bypass input cable connection portion 430 And an insulating portion 814 having a conical outer peripheral surface 815 corresponding to the conical inner peripheral surface 433 (see Fig. 5).

The primary side bypass input cable switch connection port 820 is connected to the connection protrusion 822 corresponding to the connection groove 612 of the primary side switch input terminal 610 of the primary side switch 600, A connecting groove 823 corresponding to the conductor portion 803 of the cable 800 and a conical inner peripheral surface 824 corresponding to the conical outer peripheral surface 614 of the primary side switch input terminal 610 of the primary side switch 600 A conductor section 821 and an insulator section 825 surrounding the conductor section 821 (see FIG. 7).

When the primary side bypass output cable 900 is connected to the primary side switch output terminal 620 of the primary side switch 600, the insulating cloth 902 at one end of the primary side bypass output cable 900 is peeled off The conductor portion 901 may be exposed to directly connect the conductor portion 901 to the conductor portion 621 of the primary side switch output terminal 620 of the primary side switch 600. However, It is preferable that the connection is made by the connection port 910.

The primary side bypass output cable switch connection port 910 is connected to the connection protrusion 912 corresponding to the connection groove 612 of the primary side switch output terminal 610 of the primary side switch 600, The connection groove 913 corresponding to the conductor portion 901 of the cable 900 and the conical inner peripheral surface 914 corresponding to the conical outer peripheral surface 624 of the primary side switch output terminal 610 of the primary side switch 600 A conductor 911 and an insulator 915 surrounding the conductor 911 (see FIG. 7).

A primary side bypass output cable connection port 920 for connecting the primary side junction cable 1300 is coupled to the other end of the primary side bypass output cable 900.

The primary side bypass output cable junction connection port 920 includes a conductor portion 921 having a connection groove 922 and a connection groove 923 corresponding to the conductor portion 903 of the primary side bypass output cable 900, And an insulator portion 924 surrounding the conductor portion 921 and having a conical outer peripheral surface 925 (see FIG. 9).

The primary side bypass output cable junction connection port 920 is mounted on the mounting plate 12 of the cabinet 10.

A secondary bypass input cable junction connection port 1010 is coupled to one end of the secondary bypass input cable 1000.

The secondary bypass input cable junction connection port 1010 includes a conductor portion 1011 having a connection groove 1012 and a connection groove 1013 corresponding to the conductor portion 1001 of the secondary bypass input cable 1000, And an insulator portion 1014 surrounding the conductor portion 1011 and having a conical outer circumferential surface 1015 (see FIG. 10).

The secondary bypass output cable junction connection port 1010 is mounted on the mounting plate 12 of the cabinet 10. The conductor portion 1001 is a portion exposed by peeling the insulation coating 1002.

When connecting the secondary bypass input cable 1000 to the secondary switch input terminal 710 of the secondary switch 700, the insulating cover 1004 at one end of the secondary bypass input cable 1000 is peeled off The conductor portion 1003 may be exposed to directly connect the conductor portion 1003 to the secondary side switch input terminal 710 of the secondary side switch 700. The conductor portion 1003 may be directly connected to the secondary side switch input terminal 710 of the secondary side switch 700 by the secondary side bypass input cable switch 1020 It is preferable to connect them.

The secondary side bypass input cable switch connection port 1020 is connected to the connection protrusion 1022 corresponding to the connection groove 712 of the secondary side switch input terminal 710 of the secondary side switch 700, The connection groove 1023 corresponding to the conductor portion 1003 of the cable 1000 and the conical inner peripheral surface 1024 corresponding to the conical outer peripheral surface 714 of the secondary side switch input terminal 710 of the secondary side switch 700 A conductor portion 1021, and an insulator portion 1025 surrounding the conductor portion 1021 (see FIG. 8). The conductor portion 1003 is a portion exposed by peeling the insulating cover 1004.

When connecting the secondary bypass output cable 1100 to the secondary side switch output terminal 720 of the secondary side switch 700, the insulating cloth 1102 at one end of the secondary side bypass output cable 1100 is peeled off The conductor portion 1101 may be exposed to directly connect the conductor portion 1101 to the conductor portion 721 of the secondary side switch output terminal 720 of the secondary side switch 700. However, It is preferable that they are connected by a connection port 1110.

The secondary side bypass output cable switch connection port 1110 is connected to the connection protrusion 1112 corresponding to the connection groove 722 of the secondary side switch output terminal 720 of the secondary side switch 700, A connecting groove 1113 corresponding to the conductor portion 1101 of the cable 1100 and a conical inner peripheral surface 1114 corresponding to the conical outer peripheral surface 723 of the secondary side switch output terminal 720 of the secondary side switch 700 And the insulator portion 1115 surrounding the conductor portion 1111 (see FIG. 8).

When the secondary bypass output cable 1100 is connected to the secondary bypass output cable connecting portion 530 of the secondary side composite connection port 500, the insulating cloth 1104 at the end portion of the secondary side bypass output cable 1100 The conductor portion 1103 may be directly connected to the conductor portion 531 of the secondary bypass output cable connection portion 530 of the secondary side composite connection port 500 by removing the conductor portion 1103 Side bypass output cable transformer connection port 1120 connected to both ends.

The secondary side bypass output cable transformer connection port 1120 has a connection groove 1122 corresponding to the connection protrusion 532 of the secondary bypass output cable connection portion 530 of the secondary side composite connection port 500, A conductor portion 1121 having a connection groove 1123 corresponding to the conductor portion 1003 of the bypass output cable 1100 and a conductor portion 1121 surrounding the conductor portion 1121 and connected to the secondary side bypass output cable connection portion 530 And an insulator portion 1124 having a conical outer peripheral surface 1125 corresponding to the conical inner peripheral surface 533 (see Fig. 6).

The movable transformer primary terminal 1210 and the movable transformer secondary terminal 1220 of the movable transformer 1200 are formed in a conventional bushing shape and the conductors 1211 and 1221 in which the connection grooves 1212 and 1222 are formed, And insulator portions 1213 and 1223 surrounding the conductor portions 1211 and 1221 and having conical outer circumferential surfaces 1214 and 1224.

A primary junction cable bypass connection port 1310 and a primary junction cable movable transformer connection port 1320 are coupled to both ends of the primary junction cable 1300.

The primary side junction cable 1300 is formed by peeling the covering portions 1302 and 1304 at both ends so that the conductor portions 1301 and 1303 are exposed so that the primary side junction cable bypass connection 1310 And the primary side junction cable movable transformer connection port 1320 can be connected.

The primary side junction cable bypass connection port 1310 is connected to the connection protrusion 1312 corresponding to the connection groove 922 of the primary side bypass output cable junction connection port 920 and the conductor portion of the primary side junction cable 1300 And a conical inner peripheral surface 1314 corresponding to the conical outer peripheral surface 925 of the primary side bypass output cable junction connection port 920 and the conductor portion 1311 corresponding to the conductor side 1311) (see Fig. 9).

The primary side junction cable movable transformer connection port 1320 corresponds to the connection protrusion 1322 corresponding to the connection groove 1212 of the movable transformer primary terminal 1210 and the conductive portion 1303 of the primary side junction cable 1300 And a conical inner circumferential surface 1324 corresponding to the conical outer circumferential surface 1214 of the movable transformer primary terminal 1210 and the insulator portion 1321 surrounding the conductor portion 1321 1325) (see Fig. 9).

A secondary junction cable bypass connection port 1410 and a secondary junction cable movable transformer connection port 1420 are coupled to both ends of the secondary junction cable 1400.

The secondary side junction cable 1400 has the secondary side junction cable bypass connection port 1410 connected to the conductors 1401 and 1403 by peeling the covering portions 1402 and 1404 at both ends to expose the conductor portions 1401 and 1403, And the secondary side junction cable movable transformer connection port 1420 can be connected.

The secondary junction cable bypass connection port 1410 is connected to the connection protrusion 1412 corresponding to the connection groove 1012 of the secondary bypass input cable junction connection port 1010 and the conductor portion of the secondary junction cable 1400 And a conical inner peripheral surface 1414 corresponding to the conical outer circumferential surface 1015 of the secondary bypass input cable junction connection port 1010. The conductor portion 1411 has a conical inner peripheral surface 1411) (see Fig. 10).

The secondary junction cable movable transformer connection port 1420 is connected to the connection protrusion 1422 corresponding to the connection groove 1222 of the movable transformer secondary terminal 1220 and the conductor portion 1403 of the secondary junction cable 1400, A conductor portion 1411 having a conical inner peripheral surface 1424 corresponding to the conical outer peripheral surface 1224 of the movable transformer secondary terminal 1220 and a connection groove 1423 corresponding to the conductor portion 1411, And a part 1425 (see Fig. 10).

The dismounting means 1500 includes a hollow motor shaft 1520 mounted on the underside of the ceiling plate 14 of the cabinet 10 and having internal thread portions 1521 and 1522 having opposite helical directions on both sides of the inner periphery, A motor 1510; A pair of drive screws 1530 and 1540 having male threaded portions 1531 and 1541 engaged with the female threaded portions 1521 and 1522; And connecting rods 1550 and 1560 which are respectively fixed to the driving screws 1530 and 1540 at upper ends and coupled to the primary side multiple access port 400 and the secondary side multiple access port 500.

The drive motor 1510 can be mounted by fastening a bolt (not shown) through the motor base 1511 to the roof plate 14 of the cabinet 10.

The female screw portion 1521 of the motor shaft 1520 and the male screw portion 1531 of the drive screw 1530 are formed by a right screw so that the female screw portion 1522 of the motor shaft 1520 and the male screw portion 1531 of the drive screw 1540 are screw- (1541) can be formed as a left-hand thread.

The connection units 1550 and 1560 are divided into front and rear connection units 1551, 1552, 1561 and 1562 for connecting the primary and secondary side compound connection ports 400 and 500 and the front connection units 1551 and 1561, Circular connecting grooves 1553 and 1563 are formed on the front surfaces of the rear side and rear connecting portions 1552 and 1562 of the rear case 1552 and 1562 to insert the primary side and the secondary side compound connecting port 400 and 500 between the semicircular connecting grooves 1553 and 1563 The coupling bolts 1555 and 1565 passing through the through holes 1554 and 1564 formed in the front side connecting rods 1551 and 1561 are fastened to the bolt fastening holes 1556 and 1566 formed in the rear side connecting rods 1552 and 1562 .

Through holes 1557 and 1567 are formed at the upper ends of the connecting rods 1550 and 1560 to connect the driving screws 1530 and 1540 to the connecting rods 1550 and 1560 and the driving screws 1530 and 1540 are inserted into the through- And a pair of fixing nuts 1558 and 1568 may be fastened to the driving screws 1530 and 1540 at both sides of the connecting rods 1550 and 1560.

The driving motor 1510 is operated by a switch (not shown) provided on the mounting plate 12 of the cabinet 10 so as to be movable in the direction of withdrawal (counterclockwise) (Clockwise direction).

Hereinafter, the uninterruptible maintenance and repair process of the transformer of the uninterruptible connection panel structure of the underground distribution line transformer according to the present embodiment will be described.

The ground transmission line connection port 420 of the primary side compound connection port 400 and the ground transmission line connection port 110 of the underground transmission line 100, the first bypass input cable connection portion 430 and the first side bypass input cable 800 A secondary bypass input cable connection portion 530 and a secondary bypass output connection portion 530 of the underground distribution line 200 are connected to the transformer connection port 810 of the secondary side complex connection port 500, The secondary side bypass output cable 1100 of the primary side switch 600 is connected to the secondary side bypass output cable transformer connection port 1120 of the secondary bypass output cable 1100 and the primary side switch input terminal 610 of the primary side switch 600 and the primary side A bypass input cable switch connecting port 820, a secondary switch input terminal 710 of the secondary switch 700 and a secondary bypass input cable switch connecting port 1020 of the secondary bypass input cable 1000, The primary side switch output terminal 620 of the switch 600 and the primary side bypass output The secondary side output switch cable connection port 910 of the primary side bypass output cable connection port 910 of the secondary side switchgear output cable 720 of the secondary side switch 700, (1110) is always kept connected.

The transformer primary terminal connection portion 410 of the primary side complex connection port 400 is connected to the transformer primary terminal 310 of the transformer 300 as shown in Figure 11. In the normal transmission and power distribution state in which the transformer 300 normally operates, And the transformer secondary terminal connection portion 510 of the secondary side composite connection port 500 is connected to the secondary side terminal 320 of the transformer 300 of the transformer 300.

Also, the primary side switch 600 and the secondary side switch 700 are kept in a disconnected state.

In this state, extra high voltage electricity is transmitted through the underground power transmission line 100 to the underground power transmission line connection port 110, the underground power transmission line connection part 420, the transformer primary terminal connection part 410 of the primary side complex connection port 400 and the transformer 300 The household electric or industrial electric power inputted into the input terminal of the transformer 300 through the transformer primary terminal 310 of the transformer 300 and transformed by the transformer 300 is supplied to the transformer secondary terminal 320 of the transformer 300 And the transformer secondary terminal connection portion 510 of the secondary side composite connection port 500 and the underground distribution line connection portion 520 to the underground distribution line 200 to perform normal transmission and distribution.

12, when the maintenance and repair of the transformer 300 is required, the primary-side switch 600 and the secondary-side switch 700 are kept in a disconnected state and the movable transformer 1200 of the mobile transformer 1200, The primary side junction cable movable transformer connection port 1320 and the secondary side junction cable movable transformer connection port 1420 are connected to the primary side terminal 1210 and the movable transformer secondary side terminal 1220 and the primary side junction cable bypass connection port 1310 and the secondary side junction cable bypass connection port 1410 are connected to the primary bypass output cable connection port 920 and the secondary bypass input cable connection port 1010, respectively.

At this time, the primary side switch 600 and the secondary side switch 700 are maintained in a cut-off state, so that the primary side bypass output cable 900, the primary side junction cable 1300, the secondary side bypass input cable 1000, Since the vehicle side junction cable 1400 is in a non-live wire state, the connecting operation can be performed without the risk of electric shock or the like.

Thus, the special high voltage electricity transmitted through the underground power transmission line 100 is transformed into electric power for household electric or industrial electric power by the mobile transformer 1200 and is ready to be distributed through the underground power distribution line 200.

In this state, the primary side breaker 600 and the secondary side breaker 700 are switched to the connected state so that the primary side bypass input cable 800 and the primary side bypass output cable 900 are connected to each other through the primary side breaker 600 And the secondary side bypass input cable 1000 and the secondary side bypass output cable 1100 are connected through the secondary side switch 700.

Next, when a switch (not shown) provided on the mounting plate 12 of the cabinet 10 is operated in the disengagement direction, the motor shaft 1520 of the driving motor 1510 rotates in the disengagement direction (counterclockwise direction) The driving screw 1530 engaged with the male threaded portion 1531 of the motor shaft 1520 is screwed into the female threaded portion 1521 and the male threaded portion 1531, And a drive screw 1540 engaged with a male screw portion 1542 on the right female screw portion 1522 of the motor shaft 1520 is provided with a female screw portion 1522 which is formed as a left screw, (Rightward direction) by the screw action of the male screw portion 1541. [

When the driving screws 1530 and 1540 are moved in the disengaging direction, the connecting rods 1550 and 1560 coupled to the driving screws 1530 and 1540 move in the disengaging direction and are coupled to the connecting rods 1550 and 1560 The primary side multiple access port 400 and the secondary side multiple access port 500 are moved in the attaching / detaching direction (left direction and right direction respectively) so that the primary side multiple access port 400 and the secondary side multiple access port 500 are connected to the transformer 300 The transformer primary terminal 310 and the transformer secondary terminal 320 of the transformer are disconnected from each other (see FIG. 13).

The transformer primary terminal connection portion 410 of the primary side compound connection port 400 and the transformer secondary side terminal connection portion 510 of the secondary side composite connection port 500 are connected to the transformer primary side terminal 310 and the transformer secondary side terminal 320 The worker does not manually perform the operation of dropping the workpiece from the workpiece W, and the fall-off means 1500 performs the operation by operating the switch, so that the work can be safely performed from the risk of electric shock.

As a result, extra high voltage electricity transmitted through the underground power transmission line 100 is transmitted to the primary side bypass input cable connection part 430, the primary side bypass input cable 800, the primary side switch 600, Is input to the movable transformer primary terminal 1210 of the movable transformer 1200 through the primary side bypass output cable 900 and the primary junction cable 1300 and is transformed The electricity for the electric or industrial facility is transmitted to the secondary side of the secondary junction cable 500 via the secondary side junction cable 1400, the secondary side bypass input cable 1000, the secondary side switch 700, the secondary side bypass output cable 1100, Side bypass output cable connection unit 530, the underground distribution line connection unit 520, and the underground distribution line 200.

In this state, the primary side multiple connection port 400 and the secondary side composite connection port 500 can replace or repair the transformer 300, which is disconnected from the primary side terminal 310 of the transformer and the secondary side terminal 320 of the transformer.

As such, the underground power transmission line 100 and the underground power distribution line 200 continue to be in an uninterrupted state (live state), so that the transformer 300 can be replaced or maintained in an uninterrupted state.

When a switch (not shown) provided on the mounting plate 12 of the cabinet 10 is operated in the connecting direction when the transformer 300 is completed or the transforming operation is completed and the transformer 300 is mounted again, 1540 and the connecting rods 1550, 1560 and the primary side multiple access port 400 (clockwise direction) by the above-described drop-off operation and the reverse operation described above, The primary side terminal connection portion 410 of the primary side multiple connection port 400 and the secondary side terminal connection portion 510 of the transformer secondary side of the secondary side composite connection port 500 of the primary side multi- Are connected to the transformer primary terminal 310 and the transformer secondary terminal 320, respectively.

Thereafter, the primary side switch 600 and the secondary side switch 700 are switched to the disconnected state and the primary side bypass output cable 900, the primary side junction cable 1300, the secondary side bypass input cable 1000, The primary side junction cable 1300 is disconnected from the secondary side junction cable 1400 after the primary side junction cable 1400 is in an inactive state.

At this time, when the primary side junction cable 1300 and the secondary side junction cable 1400 are separated from each other, the primary side bypass output cable 900, the primary side junction cable 1300, the secondary side bypass input cable 1000, Since the junction cable 1400 is in an inactive state, it is possible to perform a safe operation from the risk of electric shock or the like.

In this state, extra high voltage electricity is transmitted through the underground transmission line 100 to the underground transmission line connection port 110, the underground transmission line connection part 420, the transformer primary terminal connection part 410 of the primary side complex connection port 400 and the transformer 300 The household electric or industrial electric power inputted into the input terminal of the transformer 300 through the transformer primary terminal 310 of the transformer 300 and transformed by the transformer 300 is supplied to the transformer secondary terminal 320 of the transformer 300 To the underground distribution line 200 through the transformer secondary terminal connection portion 510 of the secondary side composite connection port 500 and the underground distribution line connection portion 520 and is restored to the normal transmission and distribution state again.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

10: Cabinet 100: Underground transmission line
110: Underground transmission line connection port 200: Underground distribution line
210: Underground distribution line connection port 300: Transformer
310: Transformer primary terminal 320: Transformer secondary terminal
400: Primary side multiple connection port 410: Transformer primary side terminal connection
420: Underground transmission line connection part 430: Primary side bypass input cable connection part
500: secondary side composite connection port 510: secondary side terminal connection portion of transformer
520: Underground distribution line connection part 530: Secondary bypass output cable connection part
600: primary side switch 700: secondary side switch
800: Primary bypass input cable
810: Primary side bypass input cable Transformer connection port
820: Primary side bypass input cable switch connection port
900: Primary bypass output cable
910: Primary side bypass output cable switch connection port
920: Primary side bypass output cable junction connection port
1000: Secondary bypass input cable
1010: Secondary bypass input cable junction connection port
1020: Secondary bypass input cable switch connection port
1100: Secondary bypass output cable
1110: Secondary bypass output cable switch connection port
1120: Secondary bypass output cable Transformer connection port
1200: Portable transformer 1210: Portable transformer primary terminal
1220: Mobile transformer secondary terminal 1300: Primary junction cable
1310: Primary Junction Cable Bypass Connection
1320: Primary side junction cable Portable transformer connection
1400: Secondary junction cable 1410: Secondary junction cable Bypass connection
1420: Secondary Junction Cable Portable Transformer Connection
1500: Desorption means 1510: Drive motor
1520: motor shaft 1530, 1540: drive screw
1550, 1560: Links

Claims (1)

A transformer cabinet (10) installed on the ground; A transformer 300 installed in the transformer cabinet 10 and provided with a transformer primary terminal 310 to which the underground transmission line 100 is connected and a transformer secondary terminal 320 to which the underground distribution line 200 is connected, ; A primary side multiple connection port 400 provided with a transformer primary terminal connection portion 410 detachably connected to the transformer primary terminal 310, an underground transmission line connection portion 420 and a primary bypass input cable connection portion 430, Wow; A secondary side composite connection port 500 having a transformer secondary terminal connection part 510 detachably connected to the transformer secondary side terminal 320 and an underground distribution line connection part 520 and a secondary side bypass output cable connection part 530, Wow; A transformer 300 having a primary side switch input terminal 610 and a primary side switch output terminal 620, a secondary side switch input terminal 710 and a secondary side switch output terminal 720 provided on both sides of the transformer 300, Side switch 600 and a secondary-side switch 700; A primary bypass input cable 800 for connecting the primary bypass input cable connection portion 430 of the primary side multiple access port 400 and the primary side switch input terminal 610 of the primary side switch 600, A primary side bypass output cable 900 connected to the primary side switch output terminal 620 of the primary side switch 600; A secondary side bypass input cable 1000 connected to the secondary side switch input terminal 710 of the secondary side switch 700; A secondary side bypass output cable 1100 connecting the secondary side bypass output cable connecting portion 530 of the secondary side multiple access port 500 and the secondary side switch output terminal 720 of the secondary side switch 700; A movable transformer 1200 having a movable transformer primary terminal 1210 and a movable transformer secondary terminal 1220; A primary junction cable 1300 connecting the primary bypass output cable 900 and the primary transformer primary terminal 1210; A secondary junction cable 1400 connecting the secondary bypass input cable 1000 and the movable transformer secondary terminal 1220; And a detachment means 1500 for detachably attaching the primary side multiple connection port 400 and the secondary side composite connection port 500 to the transformer primary terminal 310 and the transformer secondary terminal 320,
The cabinet 10 includes a bottom plate 12 seated on the ground and an upper portion spaced upwardly from the bottom plate 12 so that the transformer 300 and the primary side switch 500 and the secondary side switch 600 And a door 15 for opening and closing the front surface of the main body 11. The cabinet main body 11 has a mounting plate 13 and a ceiling plate 14,
The transformer primary terminal 310 and the transformer secondary terminal 320 of the transformer 300 are formed in a conventional bushing shape,
The ground transmission line 100 is provided with a ground transmission line connection port 110 connected to a ground transmission line connection unit 420 of the primary side multiple access port 400,
The ground distribution line 200 is provided with a ground distribution line connection port 210 connected to a ground distribution line connection unit 520 of the secondary side composite connection port 500,
The primary side bypass input cable 800 is connected at both ends thereof to a primary side bypass input cable transformer connection port 810 connected to the primary bypass input cable connection portion 430 of the primary side composite connection port 400, A primary bypass input cable switch connection port 820 connected to the primary switch input terminal 610 of the primary switch 600 is provided,
Side bypass output cable 900 is connected to both ends of the primary side bypass output cable 900 and connected to the primary side switch output terminal 620 of the primary side switch 600 and the primary side bypass output cable connection port 910, Side bypass output cable connection port 920 for connecting to the secondary side output cable 1300,
Side bypass input cable 1000 is provided at both ends thereof with a secondary side bypass input cable junction connection port 1010 for connecting to the secondary side junction cable 1400 and a secondary side bypass input cable connection port 1010 for connecting to the secondary side switch input terminal 1000 of the secondary side switch 700, A secondary bypass input cable switch connection port 1020 for connecting to the terminal 710 is provided,
Side bypass output cable 1100 for connecting to the secondary side switch output terminal 720 of the secondary side switch 700 and a secondary side bypass output cable connection port 1110 for connecting the secondary side bypass output cable 1100, A secondary side bypass output cable transformer connection port 1120 for connecting to the secondary side bypass output cable connection portion 530 of the connection port 500 is provided,
The primary side junction cable 1300 has a primary side junction cable bypass connection port 1310 for connecting to the primary side bypass output cable connection port 920 and a primary side junction cable bypass connection port 1310 for connecting to the primary side of the movable transformer 1200 A primary side junction cable movable transformer connection port 1320 connected to the terminal 1210 is provided,
The secondary side junction cable 1400 is provided at its both ends with a secondary side junction cable bypass connection port 1410 for connecting to the secondary side bypass input cable connection port 1010 and a secondary side junction cable bypass connection port 1410 connected to the secondary side of the mobile transformer 1200 of the mobile type transformer 1200, A secondary side junction cable movable transformer connection port 1420 for connecting to the terminal 1220 is provided,
The dismounting means 1500 includes a hollow motor shaft 1520 mounted on the underside of the ceiling plate 14 of the cabinet 10 and having internal thread portions 1521 and 1522 having opposite helical directions on both sides of the inner periphery, A motor 1510; A pair of drive screws 1530 and 1540 having male threaded portions 1531 and 1541 engaged with the female threaded portions 1521 and 1522; And a connection unit 1550 and 1560 connected to the primary side compound connection port 400 and the secondary side compound connection port 500 by being fixed to the driving screws 1530 and 1540, respectively, Uninterruptible connection panel structure.

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